We are releasing firmware version 1.2.1 for EOS -1D X for service prior to the Web announcement. We are planning to make this firmware available on the Web for download in mid-January 2013.

This firmware update is to improve operational function in response from several professional

photographers that the Image Selection button was pressed without realizing and the image size had been changed. Also, this firmware incorporates quality issue fixes that have been reported from the market.

1. Details of Functional Improvements and Fixes

1-1. The function to disable the Image Size selection button is added.

1-2. Fixes Err 70 and Err 80 which may occur depending on the camera settings, shooting scenes, or the timing of releases. Also, some complained camera freeze when Err 80 occurred.

The above mentioned (1-2) phenomenon occur in very rare instances. In addition with the firmware update for 1-1, the fixes for these phenomena have been incorporated.

a) Err 70

In customization of operational buttons, there were errors in operational program for the exposure level display in the viewfinder when the Main Dial is set to change the aperture value in Manual mode, and may cause Err 70.

b) Err 80

Err 80 may occur depending on the distance to the subject, shooting scenes, or the timing of metering.

This phenomenon occurs in very rare instances due to the error in operational program for metering when shooting a subject at a distance with telephoto lenses with focal lengths of 300 mm or 400 mm.

Can't say I've ever accidentally changed the image size, but that may be because I have that button set to use the main LCD (not the small one), so the first press of the button goes to Record func and another press is needed to set image size, plus the large LCD display makes it immediately obvious that I've pressed the button.

I am very happy with my 1Dx too (I got mine since August, one of the first units available in Europe) but I hate the Canon firmware update politics.

I hear you, but at the same time, they seem to have been getting better. Previously, expecting Canon to add a meaningful feature via firmware update was a pretty hope - they had done so, but only rarely (e.g. 5DII video features). But more recently, they added many nice features to the 7D (Auto ISO limits, etc.), added f/8 AF to the 1D X (although one could argue it should have been there from the start), etc. So while not ideal, it seems to be better than before.

canon rumors FORUM

I am happy with my 1DX and any fixes or added features via firmware is just icing on the cake (and I don't care much for icing). The red focus point feature was a nice add last time and the fix for the 200 f/2.

Canon appears to be listening to the photographers and adding features that are wanted such as disabling a button that may cause issues. The current 1 series bodies do so much more than the first generations every did. We should be thankful.

I tried the camera out at B&H photo the red light did not light in one shot mode but it worked it AI Servo mode. I'm not knocking the camera... That monster ripped out some frames in that mode

Sorry, but that's what we call a wetware problem, i.e. The source of the problem is holding the camera.

AF points can light up in One Shot. There is a setting that controls that behavior, it can either be off, auto (in which case the camera determines whether it should light up the AF point, depending on the available light level), or always on. So, presumably, it was either set to off or auto in a bright enough environment, when you tested the camera out.

One-shot mode was never the problem, the problem was in Servo mode where the AF points would not light up during tracking. That problem was addressed with a previous firmware update.